mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-12 07:57:21 +00:00
6ea31cce0b
The motivation is to use the UBI atomic volume rename functionality to allow double copy software updates on UBI. To that end the SPL is configured to always load the same volume name (e.g. "u-boot"), whereas a software updater always installs into the secondary volume "u-boot_r". After successful installation, these two volume names are switched. This extension is protected by #ifdefs as it will somewhat slow down loading of volumes by id. This is because the code needs to disable the optimization of ignoring all volume ids which are not to-be-loaded, since these can only be resolved after attaching. This adds two vtbl related functions from Linux, which are taken from the same kernel version as the current main U-Boot UBI code (Linux 4.2 64291f7db5bd8). Signed-off-by: Hamish Guthrie <hamish.guthrie@kistler.com> Signed-off-by: Markus Klotzbuecher <markus.klotzbuecher@kistler.com> Reviewed-by: Heiko Schocher <hs@denx.de> Cc: Kyungmin Park <kmpark@infradead.org>
142 lines
4.5 KiB
C
142 lines
4.5 KiB
C
/* SPDX-License-Identifier: GPL 2.0+ OR BSD-3-Clause */
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/*
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* Copyright (c) Thomas Gleixner <tglx@linutronix.de>
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*/
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#ifndef _UBOOT_MTD_UBISPL_H
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#define _UBOOT_MTD_UBISPL_H
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#include "../ubi/ubi-media.h"
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#include "ubi-wrapper.h"
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/*
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* The maximum number of volume ids we scan. So you can load volume id
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* 0 to (CONFIG_SPL_UBI_VOL_ID_MAX - 1)
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*/
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#define UBI_SPL_VOL_IDS CONFIG_SPL_UBI_VOL_IDS
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/*
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* The size of the read buffer for the fastmap blocks. In theory up to
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* UBI_FM_MAX_BLOCKS * CONFIG_SPL_MAX_PEB_SIZE. In practice today
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* one or two blocks.
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*/
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#define UBI_FM_BUF_SIZE (UBI_FM_MAX_BLOCKS*CONFIG_SPL_UBI_MAX_PEB_SIZE)
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/*
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* The size of the bitmaps for the attach/ scan
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*/
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#define UBI_FM_BM_SIZE ((CONFIG_SPL_UBI_MAX_PEBS / BITS_PER_LONG) + 1)
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/*
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* The maximum number of logical erase blocks per loadable volume
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*/
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#define UBI_MAX_VOL_LEBS CONFIG_SPL_UBI_MAX_VOL_LEBS
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/*
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* The bitmap size for the above to denote the found blocks inside the volume
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*/
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#define UBI_VOL_BM_SIZE ((UBI_MAX_VOL_LEBS / BITS_PER_LONG) + 1)
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/**
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* struct ubi_vol_info - UBISPL internal volume represenation
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* @last_block: The last block (highest LEB) found for this volume
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* @found: Bitmap to mark found LEBS
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* @lebs_to_pebs: LEB to PEB translation table
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*/
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struct ubi_vol_info {
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u32 last_block;
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unsigned long found[UBI_VOL_BM_SIZE];
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u32 lebs_to_pebs[UBI_MAX_VOL_LEBS];
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};
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/**
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* struct ubi_scan_info - UBISPL internal data for FM attach and full scan
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*
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* @read: Read function to access the flash provided by the caller
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* @peb_count: Number of physical erase blocks in the UBI FLASH area
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* aka MTD partition.
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* @peb_offset: Offset of PEB0 in the UBI FLASH area (aka MTD partition)
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* to the real start of the FLASH in erase blocks.
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* @fsize_mb: Size of the scanned FLASH area in MB (stats only)
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* @vid_offset: Offset from the start of a PEB to the VID header
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* @leb_start: Offset from the start of a PEB to the data area
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* @leb_size: Size of the data area
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*
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* @fastmap_pebs: Counter of PEBs "attached" by fastmap
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* @fastmap_anchor: The anchor PEB of the fastmap
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* @fm_sb: The fastmap super block data
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* @fm_vh: The fastmap VID header
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* @fm: Pointer to the fastmap layout
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* @fm_layout: The fastmap layout itself
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* @fm_pool: The pool of PEBs to scan at fastmap attach time
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* @fm_wl_pool: The pool of PEBs scheduled for wearleveling
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*
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* @fm_enabled: Indicator whether fastmap attachment is enabled.
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* @fm_used: Bitmap to indicate the PEBS covered by fastmap
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* @scanned: Bitmap to indicate the PEBS of which the VID header
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* hase been physically scanned.
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* @corrupt: Bitmap to indicate corrupt blocks
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* @toload: Bitmap to indicate the volumes which should be loaded
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*
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* @blockinfo: The vid headers of the scanned blocks
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* @volinfo: The volume information of the interesting (toload)
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* volumes
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* @vtbl_corrupted: Flag to indicate status of volume table
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* @vtbl: Volume table
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*
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* @fm_buf: The large fastmap attach buffer
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*/
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struct ubi_scan_info {
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ubispl_read_flash read;
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unsigned int fsize_mb;
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unsigned int peb_count;
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unsigned int peb_offset;
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unsigned long vid_offset;
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unsigned long leb_start;
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unsigned long leb_size;
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/* Fastmap: The upstream required fields */
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int fastmap_pebs;
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int fastmap_anchor;
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size_t fm_size;
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struct ubi_fm_sb fm_sb;
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struct ubi_vid_hdr fm_vh;
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struct ubi_fastmap_layout *fm;
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struct ubi_fastmap_layout fm_layout;
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struct ubi_fm_pool fm_pool;
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struct ubi_fm_pool fm_wl_pool;
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/* Fastmap: UBISPL specific data */
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int fm_enabled;
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unsigned long fm_used[UBI_FM_BM_SIZE];
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unsigned long scanned[UBI_FM_BM_SIZE];
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unsigned long corrupt[UBI_FM_BM_SIZE];
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unsigned long toload[UBI_FM_BM_SIZE];
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/* Data for storing the VID and volume information */
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struct ubi_vol_info volinfo[UBI_SPL_VOL_IDS];
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struct ubi_vid_hdr blockinfo[CONFIG_SPL_UBI_MAX_PEBS];
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#ifdef CONFIG_SPL_UBI_LOAD_BY_VOLNAME
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/* Volume table */
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int vtbl_valid;
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struct ubi_vtbl_record vtbl[UBI_SPL_VOL_IDS];
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#endif
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/* The large buffer for the fastmap */
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uint8_t fm_buf[UBI_FM_BUF_SIZE];
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};
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#ifdef CFG_DEBUG
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#define ubi_dbg(fmt, ...) printf("UBI: debug:" fmt "\n", ##__VA_ARGS__)
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#else
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#define ubi_dbg(fmt, ...)
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#endif
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#ifdef CONFIG_UBI_SILENCE_MSG
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#define ubi_msg(fmt, ...)
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#else
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#define ubi_msg(fmt, ...) printf("UBI: " fmt "\n", ##__VA_ARGS__)
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#endif
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/* UBI warning messages */
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#define ubi_warn(fmt, ...) printf("UBI warning: " fmt "\n", ##__VA_ARGS__)
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/* UBI error messages */
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#define ubi_err(fmt, ...) printf("UBI error: " fmt "\n", ##__VA_ARGS__)
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#endif
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